Vacuum circuit breaker



FIG. 1 is a front, top and right side perspective view of a vacuum circuit breaker, showing our new design;

FIG. 2 is a rear, top and left side perspective view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a left side elevational view thereof;

FIG. 6 is a right side elevational view thereof;

FIG. 7 is a top plan view thereof;

FIG. 8 is a bottom plan view thereof; and,

FIG. 9 is a reference view view showing our new design in the state of use. The broken line showing is included for the purpose of illustrating environmental structure only and forms no part of the claimed design. 

The ornamental design for a vaccuum circuit breaker, as shown and described. 